Tubing anchor for pumping oil wells



IFume 10, 1924.-'-

c. H. FRENCH TUBING ANCHOR FOR PUMPING OIL WELLS Filed Jan. 17, 1922Patented .lune 10,1924.

CLYDE H. FRENCH, 0F SHREVEPORT, LOUISIANA.

TUING ANCHOR FOR PUMPING ou. WELLS.

Application led January 17, 1922. Serial No. 529,951.

To all whom t may concern:

Be it knownthat I, CLYDE H. FRENCH, a citizen of the United States,residing at Shreveport, in the arish of Caddo and State of Louisiana,llave invented certain new and useful Improvements in Tubing Anchors forPumping Oil Wells, of which the following is a specication.

This invention relates to wells of the deep pumping type, and theprimary object of the invention is to provide a novel means for suporting the well tubing, so as to effective y prevent the dropping'l ofthe tubing in the well, in case of breakage or accident.

Owing to the great weight sustained by the top collar of the well tubingand the, constant vibration placed thereon due to the pumping operation,the well tubing often bTraks at` this point and falls into the well.

1s, the trouble and cost of taking the tubing from the well. Very often,if the rig burns down, the tube will drop into the well, and

thus cause the same trouble.

It is therefore an important object of the invention to provide a noveltubing anchor which embodies means for engaging the tubing above andbelow the ordinary 'casing head, the means for engaging the tubing belowthe casing head consisting of a slip clamp, which tends to support theweight ofthe tubing and which will effectively hold the tubing againstdropping, if the tubing breaks at the casing head or strips the threadsthereof at the collar, which is the weakest point of the tubing strinOtlgier objects of the invention are to provide in a novel tubinganchor; first, novel means for holding the tubing in position againstdropping, which will permit the easy raising of the tubingwhen desiredor necessary; second, to provide a tubing an: chor of simpleconstruction which will eliminate the usual tubing and casing ring; andthird, to provide a tubingv anchor which will effectively prevent theleakage of gas from the well casing and which only requiresa singlepacking in lieu of the multiple packing used in wells of the ordinaryconstruction now in use. i

A still further object of the invention Y. is to provide an improvedwell tubing anchor of the above character, which is durable andeiiicient in use, one that is simple and easy of course, results in lossof time and to' manufacture, and one which can be placed 'upon themarket at a reasonable cost.

With these and other objects in View, the mventlon consists in the novelconstruction, arrangement and formation of parts, as'will be.hereinafter more specifically described; claimed and illustrated in theaccompanying drawlngs, forming a part of this specification, in whichdrawings:

Figure 1 is a fragmentary longitudinal sectlon through a well casing,showing the lmprove'd tubmg anchor incorporated therewith, the anchorbeing shown in elevation.

Figure 2 is'a similar View showing the anchor in longitudinal section.

Figure 3 is a horizontal section taken on the line 3 3 of Figure 2, and

Figure 4 is a horizontal section taken on the line 4 4 of Figure 2.

Referring to the drawings in detail, wherein similar referencecharacters designate corresponding parts throughout the several views,the letter 'A indicates the improved anchor for effectively supportingand holding a well tubing B in a well casing C, which has connectedtherewith the casing head D.

The casing head D is of the ordinary construction, and includes theannular body 5, provided at its lower end with interior threads 6 forthe reception of the threaded end 7 of thewell casing C, which is madeup in the ordinary manner. The body 5 of .the casing head D is providedwith the usual gas outlets 8, in which may be threaded the ordinar leadgas pipes (not shown). The upper en of the body 5 of the casing head Dis provided with a counterbore 9', which defines the usual seat 10 forthe tubing ring or collar, and the upstandin'g guard flange 11.

The. well tubing B is made up of the 'usual ,pipe lengths 15 and issupported by the novel anchor A which 'will now be described.

The Vimproved tubing anchor A includes a head 16 having the annularflange 17 formed thereon, which is provided with a This fiange 17islower plane face 18. adapted to snugly rest' upon the seat 10, formedin the casing head D, and the plane lower face 18 of this ange isprovided with a groove 19 for the rece tion of a packing ring 20, whichis provi ed for the purpose of preventing-the leakage of gas bore ofthis nipple 21 is oi course, substantially the same as the exteriordiameter of the pipe lengths forming apart of the well tubing.

The head 16 supports a depending co-ncentrically disposed supportingsleeve 25,

the interior diameter of which isv greater than the exterior diameter ofthe well-tubing B, so as to permit the well tubing to be readily movedtherein ltor engaging the vlower set of threads 22' formed in the liftnipple 21. rlhe bore of the sleeve 25 has the outer end thereofcounter-bored, as at 26, which deines a limiting shoulder 27, thepurpose of which will hereinafter more tully'appear. The counter boredportion 26 of the sleeve 25 is provided with interior threads 28, forthe reception of the threaded portion 29' of the collar adjusting slip30. 'llhe threaded portion of the adjusting collar is reduced indiameter, as: clearly shown in lFigure 2 of the drawings, and

the interior surface of the reduced portion is gradually dared outwardlyas at 30 to l receive the slip clamp 31.v Thisslip clamp 31 consists ofa split rin 32, the outer surlface of which is tapere or wedge shaped.The inner, surface of the ring 32 is'` preferably [provided withserrations or` teeth for gripping the well tubing B. The lower end ofthe adjusting slip collar 30 is provided'with a nut tace 34 by means ofwhichA the collar may be readily turned by a wrench `for adjusting theslip clamp into intimate contact with the well tubing.

` llt is obvious that when the adjusting -slip collar 30 is rotatedv andthreadedy intov the sleeve 25, the ta ered inner face .28 thereof willbe force intoV contact with the outer tapered face of the slip clamp 31,which will force the slip into biting contact with the well tubing B.Upward movement of the slip clamp is prevented in the sleeve 25, owingto the tact that the slip clamp is adapted to seat upon the collar 27. i

lin use of the improved anchor, the upper end of the tubing is rstinserted into the lift nipple. 21, atterfwhich the adjusting collar 30is turned so as to force the slipclamp into engagement with the tubing.

The ni ple 21 and the whole anchor is then lowere until the dange 17rests upon the seat-1() and the weight of the tubing will meneercompress the gasket 26 as heretobefore stated, and form a leak prooijoint between the anchor and the well casing head D.

lE rom the foregoing description, it can be seen that an improved anchorhas been provided for the well tubing, which provides means forsupporting the tubing below the casing head, and which forms an intimateseating contact between the casing head, so as to prevent the leakage ofgas from the casing, and thus entirely eliminate the necessity ofproviding a plurality of different packings as now utilized in wellpumpcasings of the ordinary type.

Changes in details may be made without departing from the spirit orscope oic this invention; but, ll claim:

1. lin a well, the combination with a casing and well tubing, land ahead for the casing and well tubing, of an anchor connected to the welltubing at its upper end and including means for engaging the 4casinghead, and a clamp carried by the anchor for 'engaging the well tubing ata point below said casing head and remote from the irst mentioneconnection off the anchor and tubing.

2. lin a well ump, the combination with a casing, a head carried by theupper end of the casing provided with a seat,and a well tubing disposedconcentrically within the casing, of an anchor connected to said tubingadjacent said head including a head disposed upon said seat, a dependingsleeve formed on the anchor head terminating in a plane below the casinghead, and an adjustable clamp carried by the .lower end of the sleevefor engaging said well tubing at a point below said casing head andremote trom the first mentioned connection of the anchor and tubing.` 3.The combination with a well casing, a head for said casing provided witha seat at its upper end, and a well tubing disposed in said casin of ananchor orthe well tubing including a head arranged to lit on the seat inthe casing head, said anchor head being provided with interior threadsat its upper end for the reception ot a portion of the well tubing, adepending sleeve formed on the head oit the anchor extending below thecasing head, a slip clamp disposed in the lower end of the sleeve forengaging the wellitubing at a point below said casing head and remotetrom the rst mentioned connection of the anchor and tubing, and anadjustable collar carried by the sleeve tor engaging said slip.

` 4l. 'llhe combination with a well casing, a head carried by the upperend ot the casing having a seat formed on itsupper end, and a welltubing dis osed in said casing, ot an anchor for sai tubing including ahead having an 'outwardly extending dange formed thereon arranged to situpon the seat ist formed on the casing head, a lift nipple formed on theupper end of the -anchor head provided with interior threads for there;-

ception of the welltubing, a depending 5 sleeve .formed on the lower endof the head extending into the casing below the casing head and `havingan interior diameter greater than the exterior diameter of the tubing,the lower end of the sleeve being enlarged 10 interiorly and defining ashoulder and provided vwith threads, la split ring fitted inthe enlargedportion and against said shoulder and provided with interior teeth forengaging said tubing at a point remote from said first mentionedconnection ofthe anchor and tubing, the outer face of said split ringbeing tapered, and an adjustable collar threaded into the threadedportion of the sleeve having a tapered inner face for engaging said ringfor forcing the same into intimate .contact with the tubing andincludingl a polygonal shaped wrench head extelending outwardly fromthesaid depending s eeve.

y' cLYDE H. FRENCH.

